LONDON — Henry Allingham is the oldest living link to the 9 million soldiers killed in World War I.

He is 112 now, nearly blind, mostly deaf and uses a wheelchair — none of which stops him from trying to remind everyone of those long gone.

"I don't want to see them forgotten," he says quietly, speaking after the opening of a Royal Air Force Museum exhibition on the conflict. "We were pals."

For decades, Allingham didn't talk about the Great War. And then, after he hit 100, he made talking about it his mission — the excitement at the start, the thrill of flying, the blood, the lice, the fear, the dead.

His next task is to lay a wreath at Britain's war memorial, the Cenotaph, near the houses of Parliament in London, to mark the 90th anniversary of the war's end. Allingham, Britain's last flyer; Harry Patch, the last soldier, and Bill Stone, the last sailor, will lay wreaths on Tuesday.

They are the last ones standing, out of the more than 5 million who fought for Britain in World War I. The last survivors in Germany, France and Turkey have died, veterans groups said. The last living American-born veteran is 107-year-old Frank Woodruff Buckles of Charles Town, W.Va.

Dwindling ranksThe dwindling of the ranks has given additional importance to this year's ceremonies, likely the last major anniversary in which they will be able to take part. It comes after a series of 90th-anniversary commemorations of the war's worst battles — the Somme, Jutland, Ypres.

"This is the climax of something that has a momentum all its own," said William Philpott, a senior lecturer in the Department of War Studies at King's College in London.

Allingham doesn't talk much about other wars. But he does say in his memoir, "Kitchener's Last Volunteer," that he feels sorry for young soldiers fighting in Iraq.

"It was not the same in my war," he says. "We were fighting for our country and our homes... We had a lot more to lose if we failed."

He takes your hand, covers it between his, until his long soft fingers completely make your hand disappear. He looks into your eyes, trying to remember if he's met you before.

He seems glad you've come. He has something to tell you.

"We have to pray it never happens again."

'Chocks away!'In a time when many wars take place far from home, it can be hard to imagine the war to end all wars. The assassination of the heir to the Austro-Hungarian throne during his visit to Sarajevo in 1914 touched off a cataclysm that echoed into much of the ensuing century.

Allingham wanted to leave his job in a car plant and join up right away. But when his widowed mother learned of her only child's plans, she made him promise not to leave. Allingham spent the war's first months refitting trucks for military use.

After she died of cancer in 1915, Allingham joined the Royal Naval Air Service, a precursor to the Royal Air Force.

He was hoping to go to East Africa. He ended up on the east coast of England.

Only a dozen years after the Wright brothers first put up their plane at Kitty Hawk, N.C., Allingham and other air pioneers set out on elaborate kites cobbled together with wood, linen and wire. They piled on clothes and smeared their faces in Vaseline, whale oil or engine grease to block the cold.

"It was so noisy," Allingham would later write in his memoir. "I do remember the deafening throb and the chap on the ground shouting 'Chock's away!'"

Silent wounds
As a mechanic, Allingham's job was to maintain the rickety craft. He also flew as an observer on a BE2c, a plane with so little power that a strong wind might push it backward. At first, his weaponry consisted of a Lee-Enfield .303 rifle — sometimes two. In a time of limited radio capability, the airmen flew with two carrier pigeons that would be released with coordinates tied to their feet in case of water landing, so searchers could track the wreckage. They weren't issued parachutes.

He remembered a pilot who landed his plane after being shot, only to bleed to death while his comrades looked on.

"I've wondered since, if I had known first aid and applied pressure to the wound, could I have saved his life?" Allingham wrote. "I've thought about that a lot over the years."

When it was over, he and his wife, Dorothy, had two daughters and he eventually got a job at Ford. During World War II, he worked on measures to counter magnetic mines. But after that, he didn't talk about wars and armies for the better part of five decades. He wrote that it just wasn't done — people wanted to forget and move forward.

Allingham retired to the seaside town of Eastbourne and played golf until his eyesight failed at 93. Dorothy died in 1970, but when daughter, Jean, died in 2001, friends say he mostly waited to die, too.

The past comes outThat's when he met Dennis Goodwin, an independent inspector for residential care homes, who had discovered that elderly men were often not getting the care they needed to address their war nightmares.

Goodwin found himself organizing trips for veterans who wanted to return to the continent where they had fought and pay their respects to fallen comrades. Goodwin encouraged Allingham to share his experiences.

Soon, Allingham began talking to reporters and school groups. He found himself leading military parades. He met Queen Elizabeth II. He wrote his autobiography with Goodwin, "Kitchener's Last Volunteer," a reference to Britain's war secretary who rallied men to the cause. Prince Charles wrote the introduction.

"I still can't believe that all this happens to me," he wrote.

David Burner, the concierge of the Crowne Plaza Hotel where he often stays in London, says Allingham tends to "sparkle when pretty girls come up to him." Goodwin's wife, Brenda, says he sometimes breaks into song. Peter Dye, the museum's head of collections, says Allingham's been known to hit the dance floor in his wheelchair and attempt a conga.

"If he goes a bit too far, his slippers fall off," Dye says.

'They died for us'But it was a subdued Allingham who attended the exhibition opening. The soft lights set off his pale skin and made him glow at the center of the guests milling around the roped-off enclosure.